Duplicating with the aid of stencils



jan.13,1931. G. E. CRV'EED 1,788 ;662

DUPLICATING WITH THE AID 0F STENCILS Filed Dec. 18. 1929 4$hets-Sheet 1Jan. 13, 193i.

G. E. cRg D DUPLICATING WITH THE A ID OF STENCILS Filed Dec. 18, 1929 4Sheets-Sheet 2 a; (M r Jan. 13, 1931. s. E. CREED DUPLICATING WITH THEAID OF STENCILS Filed Dec. 18, 1929 4 Sheets-Sheet 3 Jan. 13, 1931,. G.E. CREED 1,783,662

DUPLIGATING WITH THE AID 0F STENCILS. I

Filed Dec 18. 1929 4 Sheets5heet 4 6 Gag;

Patented Jan. 13, 1931 f UNITED STATES PATENT OFFICE enongn nannsr01mm), or Lennon, ENGLAND, ASSIGNOR r 1). eEs'rE rNnn LIMITED,

' 01* LONDON, ENGLAND DUPLI ECATING WITHTHE 0F STENCILS Applicationfiled December 18, 1329, Serial No. 415,107, and in Great BritainDecember 20, 1928.

This invention relates to duplicating with the aid of stencils. A i

As is well known stencil sheets, which are treated for the productionofstencils for use 5 in duplicating manuscript or typewritten matter,drawings andthe like, consist of a sheet'of stencilizable materialprovided with or secured to a strip of relatively strong paper orthelike which is commonly described as a stencilheading. To the heading isalso secured a' backing sheet which after the'sheet 'has beenstencili'zed or converted into a stencil, is separated from the heading.it Hitherto it has been the usual practice to provide in the stencilheading a plurality of holes or slots, which may be of L-shape, adaptedto engage pins provided on the stencil fastening means which is part ofthedua0 plicating machine.

Similarlyporous sheets adapted to be arranged. between the stencilandythe inking means of the duplicating machine have been provided withheadings of this character.

It has, moreover, been proposed to form a stencil heading with tabs orprojections having holes or slots formed therein, the sides of the tabs,or projections being designed to facilitate the appropriate location ofthe stencil heading relatively to the stencil fas tening means which ispart of the duplicating machine and to assist in the engagement of theholes in the stencil heading with pins or studs provided, on, thefastening means:

In the following description the expression"stencil heading will beemployed generally as denoting the heading of astencil or stencil sheetand the heading of a porous "sheet or other device adapted to be mounted4 on the duplicating machine with one of its faces in contact with'oneor other of the faces ofthe stencil. v l

One object of'the present invention is to provide an improved stencilheading adapt 4 'ed'to facilitate the securing of stencils, stem-.-

cil sheets,-p-orous sheets and'the like in posi- I I I 1 are directedtowards the stencil sheet or the 7 tion on a duplicating inachine.-

i A: further object of the invention is to pro"- ride stencils, stencilsheets, porous sheets, or 4 to the like having improved heading wherebythey may be secured in position on a dupli eating machine. I

According to the invention the stencil heading is furnished with one ormore tongues or, flaps or equivalent elements the 5 free ends of which,when directed towards the stencil, stencil sheet or the like, by theirdisplacement away from the body. of the stencil heading are adapted tocooperate with stencil fastening means on the duplig eating machine andthereby secure or assist n securing stencils, stencil sheets, or thelike. 1n position thereon.

Thus, for example, the tongues or flaps or equivalent elements may bearranged to, be 05 displaced relativelyto the remaining port1on of thestencil heading in such manner thatthe fore edge or fore edges thereofwill plane parallel with'the plane ofthe body of the stencil heading areadapted to co-operate wlth the. stencil fastening means on theduphcating machine ,to secure or assist in se-.

curing the stencils, stencil sheets or the like 0 'withlwhich thestencil heading is associated in position thereon.

Thus, the tongues or flaps 'orequivalent elements may be provided onthestencil heading in such manner that when they are moved abouttheirpoint of connection with the re: 7 maining portlon of the stencilheading into a POSltlOIl 111 which they are inclined at an angletherewith, the fore edge or fore edges of 7 i the tongues or flapswilhbe adapted to bear against-an abutment member forming part of thefastening means of the duplicating machine; For example, in accordancewith the invention, the stencil heading is provided with tongues, flapsor'iequivalent elements which on the'jsten'ci'l fastening means on thedupli i cating machine they will be displaced about their point ofconnection with the body of the stencil headinginto a position in whichthey will co-operate with the said fastening means and thereby securethe stencil, stencil sheet or the like in position thereon. y Thestencil heading in accordance with the invention may conveniently beprovided with tongues, flaps or equivalent elements adapted.

by members associated with the stencil fasten: ing means on theduplicating machine extending from one face of the heading to beyond theopposite face thereof to be moved about their points of connection intoan inclined position with respect to the adjacent portion like is formedor provided with indentations 5 adapted to guide the stencil headinginto position and to facilitate in co-operation with the stencilfastening means of the duplicating machine in centering or aligning thestencil sheet or the like on the machine, when the stencil heading ismoved in one direction as, for instance, in the initial operation ofengaging it with the stencil fastening means while as above indicatedthe tonguesrfiaps or equivalent elements may be so formed as to assistin centering on aligning the stencil sheet or-the like when the stencilheading is moved in the reverse direction.

The indentations may be in staggered relation with the tongues or flapsor may be otherwise arranged and conveniently they and the tongues orflaps are V-shaped;

or more portions'of the material of the stencil- To facilitate theinsertion of .a stencil sheet, provided with such indentations, in atypewriter for the purpose of stencilizing, the steneil heading maybeprovided with a detachable portion, the free edgeot which is straightand-which when removed from the remaining portion of the stencil headingits removal provided leaves the edge left by with indentations.

Normally in accordance with the invention the tongues or flaps areformed in the stencil I heading by providing therein one or moresuitably shaped incislons so as toprov1de one ieadingadapted to bedisplaced relatively to the remainder or main portion thereof.

The invention will be described further in r detail and by way ofexample with reference or assist in securingv to the accompanyingdrawings, in which Flgure 1 1s a fragmentary view 1n elevation of astenc l sheet showing the stencil heading,

and v Figure 2 is a similar view of a porous sheet having a heading orstencil fastening means fied construction incorporating a silk carrierprovided on each of its two opposite ends with rigid members asillustrated in front and side elevations, respectively, in Figures 5 and6;

Figure 7 is a sectional view on a larger scale of one construction ofthe said means, and I Figure '8 is a front-elevation of a generallyknown type of duplicating machine provided with stencil fastening meansas illustrated in F i ures 3 to 6 or in Figure 7,

' lfi igure 9 being a v corresponding and elevation thereof, whileFigures 10 and 11 are, respectively, fragmentary views in elevation ofan alternative form of stencil heading-provided on a stencil sheet and abacking sheet, respectively.

Referring to Figure 1, 1 represents a portion of the backing sheet ofthe stencil sheet,

. 2 a stencil sheet attached thereto, 3 the'stencil heading which formsa continuation of the backing sheet which will normally be a sheet ofrelatively stiff paper doubled over adjacent to one end to provide areinforced and strengthened portion forming the stencil heading, 4 aretongues or flaps formed in the stencil heading by providing therein V-shaped incisions 5, the top edge of the stencil heading being cut backto form recesses 6 in the vicinity of the incisions to prevent thisportion of the heading being distorted in consequence of thedisplacement of the tongues when the stencil sheet is placed on thestencil-duplicating machine. In addition, deep or recesses 7are-provided in the. stencil heading, as illustrated in Figure 1, theserecesses being provided in the construction illustrated to. enable thestencil sheet to beclnounted on a poroussheet as illustrated in Figure2.

In Figure 2, 8 illustrates the backing sheet for the porous sheet '9,which may be a sheet of yoshino paper, the backing sheet being providedmerelyforthc purpose of facilitating the handling of a material of theflimsy character of yoshino paper or other suitable highly orousmaterial. 1

The acking sheet which is engaged with the porous sheet at one endconstitutes the heading 10 adapted to be secured to the stcn-' cilfastening means of the duplicating-machine. and this heading isfurnished with loo the duplicating machine in association with 1 illI35. orporous sheet withthe fastening means.

I rhea-sea tongues 11 by. formin in the material of the the stencilheading for the purpose explained I V :in connection with Figure 1 andother deep-- or recesses'll' are .provided in the stencil heading. Thesedeeper recesses, as will be seen, are arranged so that, when a structureas illustrated in Figure 1' is su erimpbsed on igure 2 with" astructureas illustrated vin the edges of the sheets in alignment, they I.w-ill not. bein register with the-deep recesses v 7 in the stencilsheet but with the tongues therein, while the deep recesses? in thehead:- ing of the stencil sheet will'be in register with the tongues .11on the heading of the porous sheet, the urpose of this arrangement beingto enable t he'tongu'es on the two 'sheetsto be displaced independentlyof one another in a manner'hereinafter to be described. a

' Referring to Figures 3, 4 and 7 ,which illusv trate the stencilfasteningineans normally secured to 01" forming part of theduplicating Imachine, 15 is the lower member-thereofwhich will be located adjacent to.the "inking means of'the duplicating machine and which I extends thewhole width thereof'and 1 6 is an .upper member hinged to the lowermember by the pin 17 and associated witha" spring .18

adapted to constrain the free edges of the two members to approach oneanother, a tongue 19 being rovided for moving theupper men bGFT-elMHVelyto the lower memberin opposition-to the-spring when engaging a stencilTheu per member lfirisby, a pressing op- -.eration unned withrecesses20, the forwardlimits 21 of-tliese recesses forming abutme-nts for thetongues on the stencil headingand the 401 heading of the porous sheet.

In the constructionillustrated in Figure 7.

' 'one of several possible alternative constructions of heading fallingwithin the scope of I the invention. i i

on the lower member 15 of the stencil fastoning means are provided aplurality of tongues 22-certainof which are arranged to displace thetongues on the stencil heading or the tongues in the. heading of theporous sheet in the manner shown in this figure thereby causing theforward edge of the elevations 22 in Figure .7 but instead of beingformed on the lower member of the stencil fastening, means they areformed in the ri 'd member24 which is secured'to one end 0 "the'silk'lcarrier 25,'see Figures 5 and-6, co? the. other endof which is securedin the rigid member26. The member124 is provided also withproject-i0ns27 on itsunderface adapted" toengage in corresponding holes28' in the [lower member of the stencil fastening means.

In. the stencilifastening means arecess 291$:

1 tions to a le'n inking cylinders and adaptedto pressthe p per on whichthe mattercut in the stencil placement. In Figure 11, 54;-i11dicates thebacking of member of the-stencil fastenihgmean pin is provided toprevent-thematic place the eton'guesioriit oil sheetan'dp'n th sheet;

Asshownjin teningm'eans'lis 1g e ea d protector, whichmzltfnmgisg-connected to a member. i These s 38 of-the slides-533 beingarranged to be engaged by loops 39- in-the ends of the springs d' u'eadown iniithe' hen-igsorengag'ed;

,"the; stencil fa's;

construe; I flex ble and -ink-proof sheet materialrtll; ommonlyiknown'asthe rovided in therear edge? Of'th rigid-meme Y headingv-shapedinclsions 12. Adjacent to or 24 and a pin 30 is protided ithlower;

these incisions recesses 13 are provided ini 'with slides33 engaged bypins 34onthe rigid I p des re located-adjacent to the holes;3'5zdesig'nedto engage pins36= on thewflexible steel'bands tl'lprovided.in the construction of; duplicatin -m'achine illus .tratedin Figures-8fand-9, t eiupturned ends 40 secured to the rigid member 26 provided rin one end of'the silk' carrier. In; this way the silk carrier,with the.rigid member '24 engaged by the stencil iasteningmea-ns will be drawntightly over-the, inking rollers and the protector 31 will also be drawntaut.

- In Figures 8 and .9, 41 are the side members of the duplicating macine, t2-and 43 the the stencil. 1 1

- The stencil headin maybe varied in form is to be formed against thepressure :roller and construction wit in relatively wide li1nits withoutexceedin -the scope of the pres ent invention and figures 10 and 11 showIn Figure 10', 48 indicates thebacking sheet of a stencil sheet, 49the-mainportion of the heading which is formed with recesses the dottedlines 52 constituting tongues or f flaps adapted to be displaced in amanner sinr' ilaruto the tongues 7 inthe construction illus trated inFigure 1 by theelevations '22 or 23 on the 'stencil fastening means.(see Figures 4 and-7), the slots 53 being provided toenable the saidelevations .to effect suchfdiss the porous sheet, '55. the extremitiesof V-sh'apled elements forming part of-theheading w ich when bent overalon the dotted.

lines 56 will constitute tongues a apted to'be displacedby elevations onthe stencil fasten ing means'enteringthe holes 57.

l. he; invention is particularly, concerned with stencil sheets for usewith the fastening means as described in the specification of the vcatlngmachlne, comprising a body copending application for LettersPatent No.415,106. ,y

Having now described my invention, what I claim as new and desire tosecure by Letters Patentisz v 1. A stencil heading wherebystencilsheets, porous sheets,. and the like may be engaged with thestencil fastening means of a dupli ortion and tongues connected withsaid he y portion adapted when directed towards the stencil sheet bytheir displacement from the plane of the body portion to co-operate withthe stencil fastening means of aduplicating machine in securing thestencil sheet in position thereon.

2. A stencil heading wherebystencil sheets, porous sheets, and the likemay be engaged with the stencil fastening means of a duplieatingmachine, comprising a body portion with the stencil fastening means of aand tongue elements hingedly connected with the body-portion adaptedwhen directedtowards the stencil sheet b their displacement from-theplane of the y portion to cm operate with the stencilfastening means ofa duplicating machine in securing the stencil sheet in position thereon.

3. A stencil heading whereby stencil sheets,

porous. sheets and thelike may beengaged P- catmg machine, sa d stencil.fastening means including, an abutment member, comprising a body portionand tongues connected with said body portion adapted when directedtowards the stencil sheet byfthir displacement away from the plane ofthe-body portion to bear against the abutment member of the stencilfastening means.

- (1. A stencil heading whereby stencil sheets,

- porous sheets and the like may 'beengaged with the ncil fasteningmeans of a duplicating machine, said stencil fastening means includingan abutment member, comprising a. body ortion of a width correspondingwith the wi th of the stencil sheet and ton e elements hingedlyconnected with the b y portion adaptedby their displacement from the fplane of the same to engage against the abutment member of the stencilfasteninglmeans.

5. A -stencil,headingwh'ereby stencil sheets, porous sheets and the likemay be engaged with the stencil fastening means of a duplii eatingmachine, comprising a. body portion and tongue elements in hingedconnection with said body portion having their fore edges directed awayfrom the hinged connection and towards the bod of the stencilsheet.

6-. A stencil heading w ,ereby stencil sheets, porous sheets and thelike may be engaged with the stencil fastening means of a duplicatingmachine, comprising a body portion,

I tongue elements in hinged connection with 'sai body portion havingtheir fore edges directed away from the hinged connection and towardsthe body of the stencil and incisions in the body of theheading adjacentto the tongue elements adapted to facilitate displacement of the tongueelements from the plane of the body portion.

7. A stencil heading whereby stencil sheets, porous sheets, and the likemay be en aged with the stencil fastening means. of a duplicatingmachine, comprising a body portion and incisions therein leaving tongueelements adapted to be displaced'relatively to the body portion' 8. Astencil heading whereby stencil sheets, porous sheets, and the like maybe engaged with-the stencil fastening means of a uplicating machine,comprising a body portion, incisions therein forming open-ended sleaving tongues movable relative to the b0 y ortion.

9. stencil head whereby stencil sheets, porous sheets, an the like maybeengaged with the stencil fastening means of a duplicating machine,comprising a strip of sheet material ada ted to extend substantiallyacross the in 'ng means of a rotary duplicating machine and parallelwith the axis of rotation of the said inkin and bifurcated incisions insaid strip 10. A stencil sheet, a heading formed of tough sheet materialsecured 'to one edge thereof and incisions in the heading leavintongueelements, the \free extremities 0 which are directed towards thestencil sheet; 11. A stencil sheet, a heading formed of tough sheetmaterial secured to one ed means,

thereof and bifurcated incisions in thehea ing leavi ton .tremities 2%whic material than'the be of the. stencil s eet connected therewithadjacent to one end of the stencil heading and bifurcated incisions inthe stencil heading, the free edges of which are directed towards thestencil sheet.

14. A combined stencil sheet comprising a sheet of stencilizablematerial, a backmg sheet of relatively flexibl'e'but tough. materialarranged on one side of the stencil at relatively tou 1...

ice

sheet, a connection between the sheet of.

stenciliaable' material-and the backing sheet adjacent to one end'thereof and bifurcated incisions inithe material of'the backing sheetleaving tongues, the fore edges of which are directed towards the main.portion of thestencil sheet 15. A combined stencil sheet comprising asheet. of f stencilizable material, a backing sheet of relativelyflexible but tough material arranged on one side, of the stencil sheet,7a,?

connection between the sheet of stencilizable material and the backingsheet adjacent to 8 one end thereof and V-shaped incisions in thematerial of the backing sheet leaving tongues, the fore edges of whichare directe towards the main portion of the stencil sheet. v 10 16. Acombined stencil sheet comprising a sheet of stencilizable material, abackmg sheet of relatively flexible but tough material arranged on oneside of the stencil sheet, a connection between the sheet ofstencilizable material and the backing sheet adjacent to one end thereofand V-shaped incisions and V-shaped recesses in the free edge of thestencil heading, the a ices of the V-shaped recesses and incisions eing'at right angles with the line of connectlon between the stencilizablematerial and thesbackin sheet.

17. A stencil sheet, a heading 0 tough sheet material secured adjacentto one edge thereof and tongues on the said heading adapted bydisplacement vto efie'c-t engagement of the stencil sheet with thestencil fas tening means of a du licating machine.

18. A stencil heading comprising tongue elements normally in the planeof the heading adapted to be inclined relatively to the heading toengage the stencil fastening means of a duplicating machine 19. Astencil sheet comprising a heading, and tongue elements normally m theplane of'the headin adapted to'be inclined relatively to theeading toengage the stencil fastening means of a do licating machine.

In testimony whereo I have signed my v name to this specification.

40 GEORGE ERNEST CREED.

